What EDMS to choose for correspondence control and execution of tasks set on the basis of correspondence?

Question

Document flow

Which EDMS (or maybe not EDMS) to choose to control the execution of tasks created on the basis of incoming mail?
~TK:
The main task is that a letter received by the secretary's mail is unsubscribed to the appropriate manager, who unsubscribes to its performers, etc. The process should look like a task, and be controlled by management.
Secondary tasks: coordination of orders, contracts, etc.
Requirements:
- Work from browser and mobile clients.
- I understand that the EDMS and the mail client should be one.

Answer 1

which one do you choose?

Answer 2

Verdox/Infotum